Figure 2.

Sequence of the 1.6-kb HindIII genomic fragment in which all of the P insertions within the lio gene have occurred. The black triangle represents P element devoid of lio regulatory sequences [lio¹ (20) and drl^P (23)], gray triangles represent P456 elements, and open triangles represent P423 elements. The arrow represents the 5′ to 3′ orientation of the P elements. When several independent P elements were found at the same position in the same orientation, the number of occurrences is indicated within the triangle.